[LLVMbugs] [Bug 2959] Miscompilation of expression with multiple side-effects

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Oct 28 06:56:40 PDT 2008


Neil Booth <neil at daikokuya.co.uk> changed:

           What    |Removed                     |Added
             Status|REOPENED                    |RESOLVED
         Resolution|                            |INVALID

--- Comment #7 from Neil Booth <neil at daikokuya.co.uk>  2008-10-28 08:56:39 ---
I apologise, I misread the code entirely.  It is indeed unspecified whether the
result is 1 or 2: it depends which operand is evaluated first.  I'd initially
misread it and thought it didn't matter.  In particular

  b++ + f()

is 0 + 1 if the "b++" is calculated before the f() call; it is  1 + 1 if the
"b++" is calculated after the f() call.

Sorry for the noise.

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